I've just noticed this happen to another LJ (If you have
normallife friended, DO NOT CLICK ANY LINKS THEY GIVE.), and it happened to another LJ community maintainer's account a short while back, so I wanted to give my flist a heads-up. Be very wary of any links you click on LJ, especially if the post seems slightly out of character. Especially don't click any *.ru links. What's happened to these people is that all their posts have been summarily deleted, and a new post is made with a link to a website that will attempt to install a trojan/keylogger on your computer.
Be sure to use secure passwords and all that jazz. I've no idea what the vulnerability is in LJ accounts that allows this to happen, but just be careful.